BUG: `ddof` set to wrong value
BUG: `ddof` set to wrong value

bmockler/MOSFiT,villrv/MOSFiT,guillochon/MOSFiT,mnicholl/MOSFiT,guillochon/FriendlyFit,bmockler/MOSFiT,guillochon/MOSFiT,mnicholl/MOSFiT,guillochon/MOSFiT,mnicholl/MOSFiT,villrv/MOSFiT